Unify type of "cpu_idx" across PSCI module.

NOTE for platform integrators:
   API `plat_psci_stat_get_residency()` third argument
   `last_cpu_idx` is changed from "signed int" to the
   "unsigned int" type.

Issue / Trouble points
1. cpu_idx is used as mix of `unsigned int` and `signed int` in code
with typecasting at some places leading to coverity issues.

2. Underlying platform API's return cpu_idx as `unsigned int`
and comparison is performed with platform specific defines
`PLAFORM_xxx` which is not consistent

Misra Rule 10.4:
The value of a complex expression of integer type may only be cast to
a type that is narrower and of the same signedness as the underlying
type of the expression.

Based on above points, cpu_idx is kept as `unsigned int` to match
the API's and low-level functions and platform defines are updated
where ever required

Signed-off-by: Deepika Bhavnani <deepika.bhavnani@arm.com>
Change-Id: Ib26fd16e420c35527204b126b9b91e8babcc3a5c
diff --git a/plat/arm/board/fvp_ve/fvp_ve_def.h b/plat/arm/board/fvp_ve/fvp_ve_def.h
index 565753a..98de5f6 100644
--- a/plat/arm/board/fvp_ve/fvp_ve_def.h
+++ b/plat/arm/board/fvp_ve/fvp_ve_def.h
@@ -10,17 +10,17 @@
 #include <lib/utils_def.h>
 
 /* Default cluster count for FVP VE */
-#define FVP_VE_CLUSTER_COUNT	1
+#define FVP_VE_CLUSTER_COUNT		U(1)
 
 /* Default number of CPUs per cluster on FVP VE */
-#define FVP_VE_MAX_CPUS_PER_CLUSTER	1
+#define FVP_VE_MAX_CPUS_PER_CLUSTER	U(1)
 
 /* Default number of threads per CPU on FVP VE */
-#define FVP_VE_MAX_PE_PER_CPU	1
+#define FVP_VE_MAX_PE_PER_CPU		U(1)
 
-#define FVP_VE_CORE_COUNT 1
+#define FVP_VE_CORE_COUNT		U(1)
 
-#define FVP_VE_PRIMARY_CPU			0x0
+#define FVP_VE_PRIMARY_CPU		0x0
 
 /*******************************************************************************
  * FVP memory map related constants